Overall numerical simulation of chemical-thermal-electric conversion for an all-in-one thermoelectric generator based on micro scale combustion

• Published in: Energy (Oxford) 2024-04, Vol.292, p.130307, Article 130307
• Main Authors: He, Ziqiang, You, Jingxiang, Kang, Dugang, Zou, Qunfeng, Zhang, Wenxiang, Zhang, Zhien
• Format: Article
• Language: English
• Subjects: Combustion characteristics; Energy conversion; Micro combustion; Thermoelectric generator
• ISSN: 0360-5442
• DOI: 10.1016/j.energy.2024.130307

Micro combustion-based power systems have garnered significant attention owing to their high energy density and portability. This work presents a numerical simulation process for an integrated thermoelectric generator based on micro-combustion, which can track the chemical-thermal-electro energy conversion. The combustion performance, thermal characteristics and energy conversion for the micro-thermoelectric generator (MTEG) system are investigated. A range of equivalence ratios and Reynolds numbers (Re) is examined to provide a detailed analysis. With the increment of equivalence ratio (φ), both the energy output and the open-circuit voltage of the system significantly increase. At high φ, the voltage and energy output exhibit a growth tendency when the Re number increases. Conversely, at low φ, the voltage and energy output decrease at higher Re number. The maximum voltage of 0.264 V is achieved when φ = 1.0 and Re = 1500, while the system delivers an energy output of 1.87 W. •Numerical processes for the all-in-one thermoelectric generator based on micro combustion is developed.•Maximum voltage of 0.264 V at φ = 1.0 and Re = 1500, corresponding to electricity of 1.87 W is obtained.•Combustion characteristics and thermal performance are investigated.